RNC as in Republican National Committee. Bryon York of the Washington Examiner offers up an explanation of what’s going on. A sample:

The bottom line is that RNC members know something is terribly wrong. Some point out that chairman Reince Priebus — who is expected to be re-elected in an uncontested ballot Friday — cannot come before the committee and say, “We were out-spent” or “We couldn’t match the resources of the other side.” The party’s problem is more fundamental than that — simply put, Republicans have either a basic identity problem or an equally basic competence problem — and demands more fundamental answers.

I’d argue for a combination of both factors, but weighted more towards the former than the latter.